GAITHERSBURG, Md. (WUSA9) -- Montgomery County officials say a school bus was involved in an accident with three other cars on Friday on Clopper Road just north of Game Preserve Road in Gaithersburg, Md.
The school bus was carrying special needs children from a local elementary school, police said.
For reasons still under investigation, a van crashed into an SUV while it was waiting at the light to make a turn, police said.
That collision forced the SUV into the front of the school bus, according to police.
The driver of the car was taken to the hospital with critical injuries.
Officials say six students on the school bus have no injuries, but will be transported for evaluation purposes to a local hospital.
The accident investigation is ongoing.